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Proceedings Paper

Mirror Deformations Due To Thermal Expansion Of Inserts Bonded To Glass
Author(s): Bijan Iraninejad; Jacob Lubliner; Terry Mast; Jerry Nelson
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Paper Abstract

The support of mirrors often requires bonding inserts into holes in the mirror material. Temperature change and shrinkage of the bonding material and temperature change of the insert produce stresses that deform the optical surface. Using both classical analytical methods and finite element techniques the deformation of plates and shells due to temperature and shrinkage effects are computed. The depth of the hole can be chosen to minimize the deflection of the optical surface. A variety of geometries which include hole diameters both large and small compared to the plate thickness are studied. In addition to the general formulation of the problem, some quantitative results for the Keck Observatory Ten Meter Telescope mirror segments are presented.

Paper Details

Date Published: 3 June 1987
PDF: 9 pages
Proc. SPIE 0748, Structural Mechanics of Optical Systems II, (3 June 1987); doi: 10.1117/12.939832
Show Author Affiliations
Bijan Iraninejad, University of California (United States)
Jacob Lubliner, University of California (United States)
Terry Mast, University of California (United States)
Jerry Nelson, University of California (United States)

Published in SPIE Proceedings Vol. 0748:
Structural Mechanics of Optical Systems II
Alson E. Hatheway, Editor(s)

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